The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 1997
Filed:
Nov. 16, 1994
Miki Kato, Kariya, JP;
Kazuhiko Miyazaki, Aichi-ken, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A self-luminescent indicator which may be employed in a tachometer, a speedometer, or other such gauges in automotive vehicles. The self-luminescent indicator comprises an indicating pointer, a luminescent element, and a semitransparent member. The indicating pointer includes a housing and a cover. The housing has formed therein a groove. The luminescent element is disposed in the groove of the housing. The semitransparent member is arranged within the cover of the indicating pointer for diffusing light emitted from the luminescent element out of the indicating pointer. The semitransparent member has side walls extending substantially parallel to each other in a vertical direction parallel to a given optical path of the luminescent element. With this arrangement, the indicating pointer projects light having uniform and high brightness to an observer without having the light experience total reflection in the semitransparent member so as to improve the visibility of pointer deflection over a dial plate.